Headrest assembly for a vehicle seat

ABSTRACT

A headrest assembly for a vehicle seat. The headrest assembly includes a support bracket having a first engagement section and a moveable bracket movable between first and second positions. The headrest assembly further includes a pawl defining a cam surface. The pawl has a second engagement section and is pivotable between an engaged position, with the second engagement section engaging the first engagement section, and a disengaged position, with the second engagement section spaced from the first engagement section. The headrest assembly further includes a first tab selectively engaging and guiding the pawl into the engaged position, and a second tab selectively engaging and guiding the pawl into the disengaged position as the moveable bracket moves between the first and second positions. The headrest assembly further includes a biasing member engaging the cam surface to continuously bias the pawl into both of the engaged and disengaged positions.

RELATED APPLICATIONS

This application claims the benefit of U.S. Provisional PatentApplication No. 62/015,901, filed Jun. 23, 2014, the entire contents ofwhich are hereby incorporated by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The subject invention relates to a headrest assembly for a vehicle seat.

2. Description of Related Art

There is a desire within the transportation industry to provide avehicle seat having an adjustable headrest. Headrests provide support toa user's head and help to prevent head and neck injury in the event of acollision. In order to best support and protect a user's head, theheadrest must be able to adjust to configure to a particular user.Furthermore, adjustable headrests are desirable in vehicle seats thatmay be stowed away to provide additional cargo space. In one example,the headrest has a pivoting section and a fixed section with the fixedsection coupled to a seatback of the vehicle seat and the pivotingsection pivotally coupled to the fixed section. The headrest includes afirst latch fixed to the fixed section and a second latch movablycoupled to the pivoting section. The second latch selectively engagesthe first latch to fix the pivoting section relative to the fixedsection. The headrest includes an actuator, such as push button visiblydisposed on the headrest, with the actuator capable of moving the secondlatch into and out-of engagement with the first latch to facilitateselectively fixing the pivoting section relative to the fixed section.

While the headrest is adjustable, the first and second latches onlyallow for one fixed position for supporting the user's head. Further,the actuator visibly disposed on the headrest may be aestheticallyunappealing to the user. Therefore, there remains an opportunity todevelop an improved headrest for a vehicle seat.

SUMMARY OF THE INVENTION AND ADVANTAGES

The subject invention provides for a headrest assembly for a vehicleseat. The headrest assembly includes a support bracket adapted to bemounted to the vehicle seat with the support bracket having a firstengagement section defined between a first end and a second end. Theheadrest assembly further includes a moveable bracket coupled to thesupport bracket for movement between a first position and a secondposition. The headrest assembly further includes a pawl pivotallycoupled to the moveable bracket and defining a cam surface. The pawl hasa second engagement section and is pivotable between an engagedposition, with the second engagement section engaging the firstengagement section for securing the moveable bracket to the supportbracket in the first position, and a disengaged position, with thesecond engagement section spaced from the first engagement section forpermitting movement of the moveable bracket relative to the supportbracket between the first and second positions. The headrest assemblyfurther includes a first tab coupled to and fixed relative to thesupport bracket. The first tab selectively engages and guides the pawlinto the engaged position as the moveable bracket moves from the secondposition to the first position. The headrest assembly further includes asecond tab coupled to and fixed relative to the support bracket. Thesecond tab selectively engages and guides the pawl into the disengagedposition as the moveable bracket moves from the first position to thesecond position. The headrest assembly further includes a biasing membercoupled to the moveable bracket and engaging the cam surface of the pawlto continuously bias the pawl into both of the engaged and disengagedpositions.

Accordingly, the headrest assembly facilitates adjustability of theheadrest assembly. Specifically, the selective engagement of the secondengagement section with the first engagement section allows forselectively retaining the movable brackets relative to the supportbracket. Additionally, the continual biasing by the biasing member onthe pawl in both the engaged and disengaged positions, in conjunctionwith the first and second tabs guiding the pawl into the engaged anddisengaged positions, respectively, facilitates selectively retainingthe movable bracket relative to the support bracket without requiring anaesthetically-unpleasing actuator that the user must actuate in order toselectively allow movement of the movable bracket relative to thesupport bracket.

BRIEF DESCRIPTION OF THE DRAWINGS

Advantages of the subject invention will be readily appreciated as thesame becomes better understood by reference to the following detaileddescription when considered in connection with the accompanyingdrawings.

FIG. 1 is a perspective view of a vehicle seat and a headrest assembly.

FIG. 2 is a perspective view of the headrest assembly coupled to aframe.

FIG. 3 is a front elevational view of the headrest assembly coupled tothe frame.

FIG. 4 is a side plan view of the headrest assembly including a cushionshown in phantom, with the headrest assembly coupled to the frame.

FIG. 5 is a side plan view of the headrest assembly including a movablebracket, a pawl, and a biasing member with the movable bracket in afirst position and the pawl biased by the biasing member in an engagedposition.

FIG. 6 is a side plan view of the headrest assembly including a firstengagement section, the movable bracket, the pawl, and the biasingmember with the movable bracket pivoting toward a second position andthe pawl biased by the biasing member in the engaged position andsliding along the first engagement section.

FIG. 7 is a side plan view of the headrest assembly including a secondtab, the movable bracket, the pawl, and the biasing member with themovable bracket pivoting toward the second position and the pawlengaging the second tab and pivoting toward a disengaged positionagainst the bias of the biasing member.

FIG. 8 is a side plan view of the headrest assembly including themovable bracket, the pawl, and the biasing member with the movablebracket in the second position and the pawl biased by the biasing memberin the disengaged position.

FIG. 9 is a side plan view of the headrest assembly including a firsttab, the movable bracket, the pawl, and the biasing member with themovable bracket pivoting toward the first position and the pawl engagingthe first tab and pivoting toward the engaged position against the biasof the biasing member.

FIG. 10 is a perspective view of another embodiment of a headrestassembly coupled to the frame.

FIG. 11 is a front elevational view of the headrest assembly coupled tothe frame.

FIG. 12 is a side plan view of the headrest assembly including thecushion shown in phantom, with the headrest assembly coupled to theframe.

FIG. 13 is a side plan view of the headrest assembly including a movablebracket, a pawl, and a biasing member with the movable bracket in afirst position and the pawl biased by the biasing member in an engagedposition.

FIG. 14 is a side plan view of another embodiment of a headrest assemblyincluding a first tab, a movable bracket, a pawl, and a biasing memberwith the movable bracket pivoting toward a first position and the pawlengaging the first tab and pivoting toward an engaged position againstthe bias of the biasing member.

FIG. 15 is a side plan view of the headrest assembly including themovable bracket, the pawl, and the biasing member with the movablebracket in a second position and the pawl biased by the biasing memberin a disengaged position.

DETAILED DESCRIPTION OF THE INVENTION

Referring to the Figures, wherein like numerals indicates like orcorresponding parts throughout the several views, a headrest assembly 20for a vehicle seat 22 is generally shown in FIG. 1. The vehicle istypically a passenger car or a truck. However, it is to be appreciatedthat the vehicle may be any configuration for providing transportation.The vehicle seat 22 may include a back portion 24 and a bottom portion26 transverse to the back portion 24. The back portion 24 may support auser's back, the bottom portion 26 may support a user's legs, and theheadrest assembly 20 may support a user's head.

As shown in FIGS. 2, 3, 10, and 11, the headrest assembly 20 includes asupport bracket 28 adapted to be mounted to the vehicle seat 22. Morespecifically, the support bracket 28 may be a pair of support brackets28. The headrest assembly 20 may be coupled to the back portion 24 ofthe vehicle seat 22. The back portion 24 of the vehicle seat 22 mayinclude a frame 30 with the support brackets 28 spaced from one anotherand fixed to the frame 30. It is to be appreciated that the supportbracket 28 may be fixed to the frame 30 by welding, mechanicalfasteners, or any other suitable configuration. It is also to beappreciated that the headrest assembly 20 may be coupled to any portionof the vehicle seat 22.

As shown in FIGS. 4 and 12, the support bracket 28 has a firstengagement section 32 defined between a first end 34 and a second end36. The first engagement section 32 is spaced from the frame 30.Furthermore, the first and second ends 34, 36 are spaced from oneanother with the first end 34 closer to the frame 30 than the second end36. It is to be appreciated that the first and second ends 34, 36 may bedisposed in any configuration. The first engagement section 32 is asingle first engagement section 32 disposed along one of the pair ofsupport brackets 28. It is to be appreciated that the first engagementsection 32 may be disposed along both of the pair of support brackets28.

As shown in FIGS. 5 and 13, the first engagement section 32 may befurther defined as at least one first tooth 38. More specifically, theat least one first tooth 38 may be further defined as a plurality offirst teeth 38 extending between the first and second ends 34, 36. Morespecifically, the first teeth 38 are linearly aligned end-to-end betweenthe first and second ends 34, 36. Each of the first teeth 38 angularlyextend outwardly and toward the second end 36. More specifically, the atleast one first tooth 38 has a transition surface 40. Even morespecifically, each of the plurality of first teeth 38 has the transitionsurface 40. Furthermore, each of the plurality of first teeth 38 has anengagement surface 42. The transition surface 40 faces substantiallyaway from the support bracket 28 and the engagement surface 42substantially faces the support bracket 28. The configuration of thetransition and engagement surfaces 40, 42 will be better understoodthrough further description below.

The headrest assembly 20 includes a moveable bracket 44 coupled to thesupport bracket 28 for movement between a first position and a secondposition. More specifically, the movable bracket may be a pair ofmovable brackets with each movable bracket independently coupled to thepair of support brackets 28. Said differently, one of the pair ofmovable brackets is coupled to one of the pair of support brackets 28and the other one of the pair of movable brackets is coupled to theother one of the pair of support brackets 28.

The moveable bracket 44 may pivot about a first axis A. The headrestassembly 20 includes a pin 46 extending between the pair of supportbrackets 28 and the pair of movable brackets along the first axis A. Thepin 46 couples the respective support and movable brackets to oneanother and facilitates pivoting of the movable bracket about the firstaxis A. It is to be appreciated that the support bracket 28 and themovable bracket may be coupled to one another in any way. Furthermore,the moveable bracket 44 may pivot about the first axis A in anyconfiguration.

As shown in FIGS. 4 and 12, the headrest may further include a headrestframe 48 coupled to each of the pair of movable brackets. Morespecifically, the headrest frame 48 has a pair of ends with one of theends coupled to one of the pair of movable brackets and the other one ofthe ends coupled to the other one of the pair of movable brackets. Theheadrest frame 48 may have a substantially “U” configuration between thepair of ends with the headrest frame 48 extending away from the pair ofmovable brackets between the ends. It is to be appreciated that theheadrest frame 48 may be coupled to the movable brackets in any suitableconfiguration. It is further to be appreciated that the headrest frame48 may have any suitable shape or configuration.

The headrest may further include a cushion 50 coupled to the headrestframe 48. The cushion 50 substantially covers the support brackets 28,the movable brackets, and the headrest frame 48. The cushion 50 providesa comfortable surface for supporting the head of the user. It is to beappreciated that the headrest frame 48 may have any suitable shape orconfiguration for substantially covering at least the support brackets28, the movable brackets, and the headrest frame 48.

As described above, the moveable brackets 44 are capable of movingbetween the first and second positions. More specifically, the movablebrackets, the headrest frame 48, and the cushion 50 pivot about thefirst axis A between the first and second positions. The first andsecond positions may be any position of the movable bracket relative tothe support bracket 28. Exemplary positions of the first and secondpositions will be described in greater detail below.

The pivoting of the movable brackets, the headrest frame 48, and thecushion 50 about the first axis A facilitates positioning the cushion 50to best support the user's head. Said differently, the pivoting of themovable brackets, the headrest frame 48, and the cushion 50 allow theuser to adjust the cushion 50 to a position which best supports theuser's head.

As shown in FIGS. 5 and 13, the headrest assembly 20 includes a pawl 52pivotally coupled to the moveable bracket 44 and defining a cam surface54. More specifically, the pawl 52 may pivot about a second axis B. Thepawl 52 has a second engagement section 56 and is pivotable between anengaged position with the second engagement section 56 engaging thefirst engagement section 32 for securing the moveable bracket 44 to thesupport bracket 28 in the first position and a disengaged position withthe second engagement section 56 spaced from the first engagementsection 32 for permitting movement of the moveable bracket 44 relativeto the support bracket 28 between the first and second positions. Thepawl 52 may be a single pawl 52 having a single second engagementsection 56 selectively engaging the single first engagement section 32disposed along the one of the pair of support brackets 28. It is to beappreciated that the pawl 52 may be a pair of pawls 52 spaced from eachother and adjacent to the pair of support brackets 28 with each pawl 52having the second engagement section 56 configured to independentlyselectively engage the first engagement section 32 of each pawl's 52respective support bracket 28, as described in the alternativeconfiguration above.

As shown in FIGS. 3 and 11, the first engagement section 32 of thesupport bracket 28 and the second engagement section 56 of the pawl 52may be disposed in a first plane P1. The first and second axes A, B areoffset and parallel to one another to facilitate selective engagement ofthe second engagement section 56 with the first engagement section 32.The offset and parallel configuration of first and second axes A, Bfacilitates independent movement of the movable brackets about the firstaxis A and the pawl 52 about the second axis B. Furthermore, thedisposition of the first and second engagement sections 32, 56 along thefirst plane P1 facilitates engagement of the second engagement section56 with the first engagement section 32 as the movable brackets and theand the pawl 52 independently pivot about the first and second axes A,B, respectively.

As shown in FIGS. 5 and 13, the second engagement section 56 of the pawl52 may be spaced from the second axis B with the second engagementsection 56 rotatable about the second axis B toward and away from thesupport bracket 28 to facilitate selective engagement of the secondengagement section 56 with the first engagement section 32. Morespecifically, the pawl 52 may have a body 58 with the body 58 pivotallycoupled to the movable bracket at the second axis B with the body 58extending from the second axis B to a distal end. The second engagementsection 56 is disposed along the body 58 at the distal end. Saiddifferently, the body 58 has an oblong configuration between the secondaxis B and the distal end. The oblong configuration of the body 58extending from the second axis B to the distal end facilitates rotationof the body 58 about the second axis B and limits engagement of thesecond engagement section 56 with first engagement section 32 to onlywhen the distal end is adjacent to the support bracket 28.

The second engagement section 56 is further defined as at least onesecond tooth 60. The at least one second tooth 60 may be further definedas a plurality of second teeth 60 as shown in FIGS. 5 and 13. Theplurality of second teeth 60 are linearly aligned end-to-end along thebody 58. Alternatively, the at least one second tooth 60 may be a singletooth as shown in FIGS. 14 and 15. It is to be appreciated that the atleast one second tooth 60 may be any number of teeth.

As shown in FIGS. 5 and 13, the at least one second tooth 60 extendsaway from the body 58. The first and second engagement sections 32, 56may have opposing configurations with the first engagement section 32retaining the pawl 52 in the engaged position when the moveable bracket44 is in the first position. Said differently, the at least one secondtooth 60 extends substantially toward the first end 34 of the firstengagement section 32 when the pawl 52 is in the engaged position. Theat least one second tooth 60 engages the engagement surface 42 of the atleast one first tooth 38. The configuration of the engagement surface 42substantially facing the support bracket 28 inhibits the pivoting of thepawl 52 toward the disengaged position and retains the pawl 52 in theengaged position.

The first position may be further defined as the position of the movablebracket relative to the support bracket 28 when the second engagementsection 56 engages the first engagement section 32 in the engagedposition and the first engagement section 32 retains the pawl 52 in theengaged position, as generally shown in FIGS. 5 and 13. As describedabove, the first engagement section 32 may be the plurality of firstteeth 38. The at least one second tooth 60 of the pawl 52 may engage andbe retained by any of the plurality of first teeth 38 when the pawl 52is in the engaged position. Therefore, the first position may be anyposition of the movable bracket relative to the support bracket 28 withthe at least one second tooth 60 engaging and retained by any of theplurality of first teeth 38.

The at least one second tooth 60 may be slidable along the transitionsurface 40 as the movable bracket moves from the first position to thesecond position, as shown in FIG. 6. As described above, the transitionsurface 40 faces substantially away from the support bracket 28.Furthermore, the at least one first tooth 38 extends outwardly from thesupport bracket 28 and toward the second end 36 of the first engagementsection 32. As such, as the movable bracket pivots about the first axisA toward the second end 36 of the first engagement section 32, the atleast one second tooth 60 of the second engagement section 56 of thepawls 52 slides along the transition surface 40 of each of the secondteeth 60. When the movable bracket stops pivoting toward the second end36, the at least one second tooth 60 engages and is retained by theengagement surface 42 of the at least one first tooth 38.

The cam surface 54 may have a first region 62 and a second region 64adjacent to the first region 62. As shown in FIGS. 5 and 13, the firstand second regions 62, 64 of the cam surface 54 may be disposed alongthe body 58 of the pawl 52 opposite the second engagement section 56about the second axis B. Alternatively, as shown in FIG. 14, the firstand second regions 62, 64 of the cam surface 54 may be disposed alongthe body 58 of the pawl 52 between the second engagement section 56 andthe second axis B. It is to be appreciated that the first and secondregions 62, 64 of the cam surface 54 may be disposed anywhere along thepawl 52.

As shown in FIGS. 5 and 13, the first and second regions 62, 64 abut todefine a ridge 66. More specifically, the first and second regions 62,64 of the cam have opposing angular configurations. The first and secondregions 62, 64 abut at the ridge 66 and angle downwardly away from theridge 66 in opposing directions. Said differently, the ridge 66 projectsoutwardly from the pawl 52. It is to be appreciated that the first andsecond regions 62, 64 may have any angular configuration along the pawl52. The purpose of the ridge 66 and the first and second regions 62, 64will be further described below.

The pawl 52 may have the body 58 and a projection 68 with the projection68 extending from the body 58. The projection 68 may extend laterallyfrom the first plane P1, as shown in FIGS. 3 and 11. The projection 68may also be spaced from the second axis B and may be rotatable about thesecond axis B, as shown in FIGS. 5 and 13. It is to be appreciated thatthe projection 68 may extend from the body 58 in any suitableconfiguration. The purpose of the projection 68 will be furtherdescribed below.

As shown in FIGS. 2 and 10, the headrest assembly 20 may further includea spring 70 engaging each of the movable bracket and the support bracket28. The spring 70 may be fixed to each of the movable and supportbrackets 28. The spring 70 biases the movable bracket toward the firstposition and maintains engagement of the second engagement section 56with the first engagement section 32 in the engaged position. Saiddifferently, the spring 70 biases the movable bracket and the pawl 52toward the first end 34 of the first engagement section 32. The at leastone second tooth 60 is in turn biased into engagement with theengagement surface 42 of the at least one first tooth 38, with theengagement surface 42 retaining the pawl 52 in the engaged position.

As shown in FIGS. 5 and 13, the headrest assembly 20 includes a firsttab 72 coupled to and fixed relative to the support bracket 28.Furthermore, the headrest assembly 20 includes a second tab 74 coupledto and fixed relative to the support bracket 28. The first tab 72selectively engages and guides the pawl 52 into the engaged position asthe moveable bracket 44 moves from the second position to the firstposition. The second tab 74 selectively engages and guides the pawl 52into the disengaged position as the moveable bracket 44 moves from thefirst position to the second position. The second position may befurther defined as any position of the movable bracket relative to thesupport bracket 28 where the second tab 74 selectively engages andguides the pawl 52 into the disengaged position, as illustrated by FIGS.7 and 8.

At least one of the first and second tabs 72, 74 may be disposed betweenthe first and second ends 34, 36 of the first engagement section 32 ofthe support bracket 28 to selectively engage and guide the pawl 52 intothe respective engaged and disengaged positions. Furthermore, at leastone of the first and second tabs 72, 74 may be disposed in a secondplane P2 which is laterally offset from the first plane P1, as shown inFIGS. 3 and 11. Said differently, the second plane P2 is spaced from andsubstantially parallel to the first plane P1. The first tab 72 isdisposed in the second plane P2 and the second tab 74 is disposed in thefirst plane P1. It is to be appreciated that the first and second tabs72, 74 may be disposed in either of the first and second planes P1, P2.

As shown in FIGS. 5 and 13, the second tab 74 may be disposed at thesecond end 36 of the first engagement section 32 for guiding pivoting ofthe pawl 52 into the disengaged position. Said differently, the secondtab 74 is disposed within the first plane P1 at the second end 36 of thefirst engagement section 32. The second tab 74 may be integrally formedwith the support bracket 28 as a unit. It is to be appreciated that thesecond tab 74 may be a separate and distinct component fixed to thesupport bracket 28 by any fastening means, including but not limited towelding, mechanical fasteners, and chemical bonding.

The first tab 72 may be spaced from the second tab 74 and disposedtoward the first end 34 of the first engagement section 32. Saiddifferently, the first tab 72 is disposed in the second plane P2 and isspaced from the second tab 74 toward the first end 34 of the firstengagement section 32. It is to be appreciated that the first tab 72 maybe disposed at the first end 34 of the first engagement section 32. Itis also to be appreciated that the first tab 72 may be disposed anywherealong the first engagement section 32 or in any suitable configuration.

The first tab 72 may be a separate and distinct component fixed to thesupport bracket 28 by any fastening means, including but not limited towelding, mechanical fasteners, and chemical bonding. It is to beappreciated that the first tab 72 may be integrally formed with thesupport bracket 28 as a unit.

The projection 68 may be adapted to selectively engage at least one ofthe first and second tabs 72, 74 and guide the pawl 52 into therespective engaged and disengaged positions, as illustrated by FIG. 9.More specifically, the projection 68 extends from the body 58 toselectively engage at least one of the first and second tabs 72, 74. Asdescribed above, the first tab 72 is disposed in the second plane P2.The projection 68 extends from the first plane P1 toward the secondplane P2 with the projection 68 selectively engaging the first tab 72and with the engagement of the projection 68 with the first tab 72guiding the pawl 52 into the engaged position. It is to be appreciatedthat if the second tab 74 is disposed in the second plane P2 asalternatively described above, the projection 68 would selectivelyengage the second tab 74, with the engagement of the projection 68 withthe second tab 74 guiding the pawl 52 into the disengaged position.

The first tab 72 may have a first abutment surface 76 and the second tab74 may have a second abutment surface 76 with the pawl 52 selectivelyengaging and sliding along the first and second abutment surfaces 74, 76and pivoting into the respective engaged and disengaged positions. Thefirst and second abutment surfaces 74, 76 face one another. The firstand second abutment surfaces 74, 76 have an angular configuration withthe first and second abutment surfaces 74, 76 extending transverse tothe first engagement section 32. The first and second abutment surfaces74, 76 are at least partially disposed above the at least one firsttooth 38 of the first engagement section 32.

With the pawl 52 in the disengaged position, as shown in FIG. 8, themovable bracket may pivot about the first axis A toward the first end 34of the first engagement section 32. The projection 68 engages and slidesdown the angularly configured first abutment surface 76 of the first tab72 toward the first engagement section 32, as shown in FIG. 9. The pawl52 concurrently rotates about the second axis B toward the firstengagement section 32 as the projection 68 slides down the firstabutment surface 76. The at least one second tooth 60 of the secondengagement section 56 engages the engagement surface 42 of one of theplurality of first teeth 38 which is disposed at the first end 34 of thefirst engagement section 32, as shown in FIGS. 5 and 13. The pawl 52 isdisposed in the engaged position and the movable bracket is disposed inthe first position.

With the pawl 52 in the engaged position, the movable bracket may pivotabout the first axis A toward the second end 36 of the first engagementsection 32 with the at least one second tooth 60 sliding along thetransition surface 40 of each of the plurality of first teeth 38, asshown in FIG. 6. The body 58 of the pawl 52 engages and slides up theangularly configured second abutment surface 76 of the second tab 74away from the first engagement section 32, as shown in FIG. 7. Morespecifically, the pawl 52 rotates about the second axis B away from thefirst engagement section 32 as the body 58 slides up the second abutmentsurface 76. The second engagement section 56 of the pawl 52 disengagesthe first engagement section 32 of the support bracket 28. The pawl 52is disposed in the disengaged position and the movable bracket isdisposed in the second position, as shown in FIG. 8.

As shown in FIGS. 5, 13, and 14, the headrest assembly 20 includes abiasing member 80 coupled to the moveable bracket 44 and engaging thecam surface 54 of the pawl 52 to continuously bias the pawl 52 into bothof the engaged and disengaged positions. The biasing member 80 may havea proximal end 82 coupled to the moveable bracket 44 and may extend to adistal end 84 spaced from the proximal end 82 with the biasing member 80engaging the cam surface 54 of the pawl 52 between the proximal anddistal ends 82, 84. More specifically, the biasing member 80 may have asubstantially linear configuration between the proximal and distal ends82, 84 with the biasing member 80 engaging the cam surface 54 of thepawl 52 substantially at the distal end 84, as shown in FIGS. 5 and 13.As shown in FIG. 5, the biasing member 80 may have a hook 86 disposed atthe distal end 84. The hook 86 extends to the engage the cam surface 54disposed on the body 58 of the pawl 52 opposing the first engagementsection 32 about the second axis B as described above. Alternatively, asshown in FIG. 13, the linearly configured may lie against and engage thecam surface 54 at the distal end 84.

Alternatively, the biasing member 80 may have an arcuate configurationbetween the proximal and distal ends 82, 84 as shown in FIG. 14, withthe biasing member 80 slidably engaging the cam surface 54 of the pawl52 along the biasing member 80 between the proximal and distal ends 82,84. More specifically, the biasing member 80 engages the cam surface 54disposed on the body 58 of the pawl 52 between the first engagementsection 32 and the second axis B as described above.

The biasing member 80 may be further defined as a single biasing member80 providing a singular biasing force acting on the pawl 52 with thesingular biasing force biasing the pawl 52 into both of the engaged anddisengaged positions. More specifically, the distal end 84 of thebiasing member 80 flexes about the proximal end 82 of the biasing member80 such that the singular biasing force is exhibited rotationally on thepawl 52. It is to be appreciated that the singular biasing force may berotational, translational, or in any other configuration for biasingagainst the pawl 52.

The biasing member 80 continuously biases the pawl 52 into the engagedposition when the biasing member 80 abuts the first region 62, asgenerally illustrated by FIG. 5, and the biasing member 80 continuouslybiases the pawl 52 into the disengaged position when the biasing member80 abuts the second region 64, as generally illustrated by FIG. 8. Asdescribed above, the first and second regions 62, 64 of the cam haveopposing angular configurations. When the pawl 52 is in the engagedposition, the biasing member 80 engages the first region 62 of the camsurface 54, as shown in FIG. 5. The angular configuration of the firstregion 62 facilitates the singular biasing force biasing the pawl 52rotationally about the second axis B such that the second engagementsection 56 is rotated toward the first engagement section 32. Thesingular biasing force exerted by the biasing member 80 facilitatescontinual engagement of the second engagement section 56 with the firstengagement section 32 in the engaged position.

When the pawl 52 is in the disengaged position, the biasing member 80engages the second region 64 of the cam surface 54, as shown in FIG. 8.The angular configuration of the second region 64 facilitates thesingular biasing force biasing the pawl 52 rotationally about the secondaxis B such that the second engagement section 56 is rotated away fromthe first engagement section 32. The singular biasing force exerted bythe biasing member 80 facilitates continual spacing of the secondengagement section 56 from the first engagement section 32 in thedisengaged position.

The bias of the biasing member 80 may be overcome by rotation of thepawl 52 toward or away from the first engagement section 32 when thepawl 52 engages either one of the first and second tabs 72, 74. Thebiasing member 80 may continuously abut and slide along the cam surface54 of the pawl 52 as the pawl 52 pivots between the engaged anddisengaged positions. The biasing member 80 slides over the ridge 66 asthe pawl 52 pivots between the engaged and disengaged position, asillustrated between FIGS. 6-8. The biasing member 80 continuously biasesthe pawl 52 with the singular biasing force along the entirety of thefirst and second regions 62, 64 with the ridge 66 defining thetransition between the first and second regions 62, 64. Saiddifferently, the rotation of the pawl 52 about the second axis B as aresult of the bias by the biasing member 80 changes as the biasingmember 80 passes over the ridge 66.

The operation of pivoting the movable brackets, the headrest frame 48,the cushion 50, and the pawl 52 about the first axis A to the firstposition and concurrently pivoting the pawl 52 about the second axis Binto the engaged position for supporting the user's head will bediscussed below for illustrative purposes only. In addition, theoperation of pivoting the movable brackets, the headrest frame 48, thecushion 50, and the pawl 52 about the first axis A to the secondposition and concurrently pivoting the pawl 52 into the disengagedposition for facilitating adjustment of the movable brackets, theheadrest frame 48, the cushion 50, and the pawl 52 to a position whichthe user desires will be discussed below for illustrative purposes only.

As generally illustrated in FIG. 8, with the pawl 52 in the disengagedposition and the biasing member 80 engaging and biasing the secondregion 64 of the cam surface 54 to retain the pawl 52 in the disengagedposition, the user pivots the moveable brackets 44, the headrest frame48, the cushion 50, and the pawl 52 toward the first end 34 of the firstengagement section 32 about the first axis A. The projection 68 of thepawl 52 engages and slides down the angularly configured first abutmentsurface 76 of the first tab 72 toward the first engagement section 32,as generally illustrated in FIG. 9. The pawl 52 concurrently rotatesabout the second axis B toward the first engagement section 32 as theprojection 68 slides down the first abutment surface 76. The biasingmember 80 slides along the second region 64 toward the ridge 66. The atleast one second tooth 60 of the second engagement section 56 engagesthe engagement surface 42 of one of the plurality of first teeth 38which is disposed at the first end 34 of the first engagement section32, as generally illustrated in FIG. 5. The biasing member 80concurrently passes over the ridge 66 and engages the first region 62 ofthe cam surface 54. The pawl 52 is disposed in the engaged position andthe biasing member 80 biases the first region 62 to retain the pawl 52in the engaged position. The movable bracket is disposed in the firstposition. The spring 70 biases the movable bracket toward the first end34 of the first engagement section 32 to maintain engagement of the atleast one second tooth 60 with the engagement surface 42 of the one ofthe plurality of teeth. The moveable brackets 44, the headrest frame 48,the cushion 50, and the pawl 52 may be pivoted toward the second end 36of the first engagement section 32 about the first axis A with the atleast one second tooth 60 sliding along the transition surface 40 ofeach of the second teeth 60, as generally illustrated in FIG. 6. Theuser may selectively stop pivoting the moveable brackets 44, theheadrest frame 48, the cushion 50, and the pawl 52 anywhere between thefirst and second ends 34, 36 of the first engagement section 32, withthe at least one second tooth 60 engaging the engagement surface 42 anadjacent one of the plurality of first teeth 38 to retain the cushion 50in a desired position to support the user's head.

As generally illustrated in FIG. 5, with the pawl 52 in the engagedposition and the biasing member 80 engaging and biasing the first region62 of the cam surface 54 to retain the pawl 52 in the engaged position,the user pivots the moveable brackets 44, the headrest frame 48, thecushion 50, and the pawl 52 toward the second end 36 of the firstengagement section 32 about the first axis A. The at least one secondtooth 60 slides along the transition surface 40 of each of the secondteeth 60, as generally illustrated in FIG. 6. The body 58 of the pawl 52engages and slides up the angularly configured second abutment surface76 of the second tab 74 away from the first engagement section 32, asgenerally illustrated in FIG. 7. The pawl 52 concurrently rotates aboutthe second axis B away from the first engagement section 32 as the body58 slides up the second abutment surface 76. The biasing member 80slides along the first region 62 toward the ridge 66. The at least onesecond tooth 60 of the second engagement section 56 disengages the firstengagement section 32. The biasing member 80 concurrently passes overthe ridge 66 and engages the second region 64 of the cam surface 54. Thepawl 52 is disposed in the disengaged position and the biasing member 80biases the second region 64 to retain the pawl 52 in the disengagedposition, as generally illustrated in FIG. 8. The movable bracket isdisposed in the second position. The moveable brackets 44, the headrestframe 48, the cushion 50, and the pawl 52 may be pivoted toward thefirst end 34 of the first engagement section 32 about the first axis Ato facilitate adjustment of the movable brackets, the headrest frame 48,and the cushion 50 to a position which the user desires.

The invention has been described in an illustrative manner, and it is tobe understood that the terminology which has been used is intended to bein the nature of words of description rather than of limitation. As isnow apparent to those skilled in the art, many modifications andvariations of the subject invention are possible in light of the aboveteachings. It is, therefore, to be understood that within the scope ofthe appended claims, wherein reference numerals are merely forconvenience and are not to be in any way limiting, the invention may bepracticed otherwise than as specifically described.

What is claimed is:
 1. A headrest assembly for a vehicle seatcomprising: a support bracket adapted to be mounted to the vehicle seatwith said support bracket having a first engagement section definedbetween a first end and a second end; a moveable bracket coupled to saidsupport bracket for movement between a first position and a secondposition; a pawl pivotally coupled to said moveable bracket and defininga cam surface with said pawl having a second engagement section andbeing pivotable between an engaged position with said second engagementsection engaging said first engagement section for securing saidmoveable bracket to said support bracket in said first position and adisengaged position with said second engagement section spaced from saidfirst engagement section for permitting movement of said moveablebracket relative to said support bracket between said first and secondpositions; a first tab coupled to and fixed relative to said supportbracket with said first tab selectively engaging and guiding said pawlinto said engaged position as said moveable bracket moves from saidsecond position to said first position; a second tab coupled to andfixed relative to said support bracket with said second tab selectivelyengaging and guiding said pawl into said disengaged position as saidmoveable bracket moves from said first position to said second position;and a biasing member coupled to said moveable bracket and engaging saidcam surface of said pawl to continuously bias said pawl into both ofsaid engaged and disengaged positions.
 2. A headrest assembly as setforth in claim 1 wherein said biasing member continuously abuts andslides along said cam surface of said pawl as said pawl pivots betweensaid engaged and disengaged positions.
 3. A headrest assembly as setforth in claim 1 wherein at least one of said first and second tabs isdisposed between said first and second ends of said first engagementsection of said support bracket to selectively engage and guide saidpawl into said respective engaged and disengaged positions.
 4. Aheadrest assembly as set forth in claim 1 wherein said cam surface has afirst region and a second region adjacent to said first region, withsaid biasing member continuously biasing said pawl into said engagedposition when said biasing member abuts said first region and saidbiasing member continuously biasing said pawl into said disengagedposition when said biasing member abuts said second region.
 5. Aheadrest assembly as set forth in claim 4 wherein said first and secondregions abut to define a ridge with said biasing member sliding oversaid ridge as said pawl pivots between said engaged and disengagedposition.
 6. A headrest assembly as set forth in claim 1 furtherincluding a spring engaging each of said movable bracket and saidsupport bracket with said spring biasing said movable bracket towardsaid first position and maintaining engagement of said second engagementsection with said first engagement section in said engaged position. 7.A headrest assembly as set forth in claim 1 wherein said firstengagement section of said support bracket and said second engagementsection of said pawl are disposed in a first plane and at least one ofsaid first and second tabs is disposed in a second plane which islaterally offset from said first plane.
 8. A headrest assembly as setforth in claim 7 wherein said pawl defines a projection which extendslaterally from said first plane and is adapted to selectively engage atleast one of said first and second tabs and guide said pawl into saidrespective engaged and disengaged positions.
 9. A headrest assembly asset forth in claim 1 wherein said second tab is disposed at said secondend of said first engagement section for guiding pivoting of said pawlinto said disengaged position.
 10. A headrest assembly as set forth inclaim 9 wherein said first tab is spaced from said second tab anddisposed toward said first end of said first engagement section.
 11. Aheadrest assembly as set forth in claim 1 wherein said first and secondengagement sections have opposing configurations with said firstengagement section retaining said pawl in said engaged position whensaid moveable bracket is in said first position.
 12. A headrest assemblyas set forth in claim 1 wherein said first engagement section is furtherdefined as at least one first tooth and said second engagement sectionis further defined as at least one second tooth.
 13. A headrest assemblyas set forth in claim 12 wherein said at least one first tooth has atransition surface with said at least one second tooth slidable alongsaid transition surface as said movable bracket moves from said firstposition to said second position.
 14. A headrest assembly as set forthin claim 1 wherein said moveable bracket pivots about a first axis andsaid pawl pivots about a second axis with said first and second axesoffset and parallel to one another to facilitate selective engagement ofsaid second engagement section with said first engagement section.
 15. Aheadrest assembly as set forth in claim 14 wherein said pawl defines aprojection spaced from said second axis and rotatable about said secondaxis with said projection adapted to selectively engage at least one ofsaid first and second tabs and rotatably guide said pawl into saidrespective engaged and disengaged positions as said moveable bracketmoves between said first and second positions.
 16. A headrest assemblyas set forth in claim 14 wherein said second engagement section of saidpawl is spaced from said second axis with said second engagement sectionrotatable about said second axis toward and away from said supportbracket to facilitate selective engagement of said second engagementsection with said first engagement section.
 17. A headrest assembly asset forth in claim 1 wherein said pawl has a body and a projection withsaid projection extending from said body to selectively engage at leastone of said first and second tabs.
 18. A headrest assembly as set forthin claim 1 wherein said first tab has a first abutment surface and saidsecond tab has a second abutment surface with said pawl selectivelyengaging and sliding along said first and second abutment surfaces andpivoting into said respective engaged and disengaged positions.
 19. Aheadrest assembly as set forth in claim 1 wherein said biasing memberhas a proximal end coupled to said moveable bracket and extends to adistal end spaced from said proximal end with said biasing memberengaging said cam surface of said pawl between said proximal and distalends.
 20. A headrest assembly as set forth in claim 19 wherein saidbiasing member has a substantially linear configuration between saidproximal and distal ends with said biasing member engaging said camsurface of said pawl substantially at said distal end.
 21. A headrestassembly as set forth in claim 19 wherein said biasing member has anarcuate configuration between said proximal and distal ends with saidbiasing member slidably engaging said cam surface of said pawl alongsaid biasing member between said proximal and distal ends.
 22. Aheadrest assembly as set forth in claim 1 wherein said biasing member isfurther defined as a single biasing member providing a singular biasingforce acting on said pawl with said singular biasing force biasing saidpawl into both of said engaged and disengaged positions.